{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical"], "input": "At present , inhibitors from snake serum and plasma , several synthetic compounds and their analogs have been demonstrated to possess anti - snake venom activities , but the use of plant metabolites for this purpose has an added advantage of traditional knowledge and will make the treatment cheaper and more accessible to the affected population ."}
{"Chemical": []}